2500XL/2 (250-4075) Math Coprocessor Faxback Doc. # 1489 The math coprocessor socket, U35, is located on the main logic board. Refer to "Opening the Computer" for instructions on how to reach the main logic board. CAUTION: Incorrect installation of the math coprocessor can cause electrical damage to the main logic board or the coprocessor. Read the instructions in this section completely before attempting to install your math coprocessor. You can also refer to the installation instructions included with the coprocessor. Radio Shack Service Center technicians will install optional devices if you choose not to do so yourself. CAUTION: Static electricity can damage electronic parts such as the math coprocessor. Touch a grounded metal object before handling electrical components, or use protective static-grounding equipment while handling electrical components. 1. Orient the math coprocessor so that the notch in the end of the coprocessor aligns with the notched end of the socket. 2. Taking care not to bend or touch the metal pins, press the coprocessor into the socket.